Scythe-grinding attachment.



1. S. WINCRANTZ.

SCYTHE GRINDING ATTACHMENT.

APPLICATION FILED NOV- 19, 1915.

- 1 1 75, 1 O5 Patented Mar. 14, 1916.

2 SHEETS-SHEET I.

THE COLUMBIA Puuyomupn c0., WASHINGTON, u. c.

I. s. WlNCRANTZ-. SCYTHE GRINDING ATTACHMENT.

APPLICATION FILED NOV-19. 1915.

2 SHEETSSHEET 2.

Patented Mar. 14, 1916.

iliillllllllllii llIIlI WITNESS NVENTOR ATTRNEY$ mum m, WM". 0. L

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JOHN S. WINCRANTZ, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOB TO SAMUEL S.NEWMAN, OF PITTSBURGH, PENNSYLVANIA.

SCYTHE-GRINDING ATTACHMENT.

Application filed November 19, 1915.

To all whom it may concern:

Be it known that I, J OHN S. /VINonAN'rz, a citizen of the UnitedStates, residing at Pittsburgh, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inScythe- Grinding Attachments, of which the following is ,aspecification.

The invention relates to scythe grinding attachments, and has for itsprimary objects, the provision of an attachment which can be used togrind a scythe upon the edge of the ordinary disk grinding wheel; andthe provision of an attachment of cheap simple construction permittingof the grinding of the scythe edge along substantially its entirelength. Certain embodiments of the invention are illustrated in theaccompanying drawings, wherein-- Figure 1 is a side elevation of agrinding machine with the attachment applied thereto, the scythe bladebeing ground being indicated by the dot-and-dash lines; Fig. 2 is afront elevation of the apparatus with the scythe blade being ground insection; and Figs. 3' and 4 are front elevations showing modifications.

The attachment of Figs. 1 and 2 is shown as applied to the ordinary diskgrinding wheel 1, operated from the handle 2, the driving gears beinglocated in the casing 3. The casing is provided with the usual bracketsocket 1 with the thumb screw 5 for securing the bracket in position. Abracket arm 6 has its horizontal arm fitting into the socket, while itsupright arm carries the guide for the scythe blade. Mounted for slidingadjustment upon the upper end of the arm 6 is the angle arm 7, such armbeing slotted as indicated at. 8 (Fig. 1) and being held adjustable bymeans of the thumb nut 9 so that the angle arm 7 can be adjusted to suitwheels of varying diameters, and to give the blade of the scythe theproper an le with respect to the grinding surface. Mounted upon theunder side of the arm 7 is the member 10, such member carrying a bolt 11fitting a slot in the arm 7 and carrying a thumb nut 12, so that themember 10 can be adjusted in and out depending upon the width of thescythe to be ground and upon the portion of the edge of Patented Mar.14, 1916.

Serial No. 62,268.

the wheel with which it is desired that the edge of the scythe shouldengage.

The member 10 is provided with a depending L-shaped portion 13, havingan upturned edge 14. This upturned edge 14 is adapted to engage thegroove 15 at the outer edge of the scythe blade 16. The scythe blade isthus guided as against vertical movement and also as against lateralmovement, and all that is required of the operator is to slide thescythe blade longitudinally back and forth upon its guide with the edgein contact with the surface of the grinding wheel.

The two adjustments made possible by the useof the thumb nuts 9 and 12permit the device to be adjusted to suit all varying conditions whichmay arise and to position the blade at the proper angle with respect tothe wheel. The bracket arm 6 has its upright portion preferably bent atan acute angle A with respect to the horizontal arm so as to bring thedepending guide portion 13 above the axis of rotation 17 of the wheel(Fig. 1) so that substantially the entire length of the scythe blade canbe applied to the grinding surface of the Wheel. This obviously wouldnot be the case if the depending portion 13 were located to the right ofthe position shown in Fig; 1, as under these conditions the portion ofthe scythe iron which is bent at right angles to the blade and is driveninto the handle would come in contact with the upright portion of thebracket arm 6 and prevent the blade from being moved far enough to theleft to grind the rear portion of the scythe blade. It is, therefore,important that the guide member be located substantially over the centerline of the wheel, and the bending of the bracket arm 6 at an acuteangle provides a convenient means for securing this result. It is also amatter of great advantage to be able to grind the scythe blade upon theedge of an ordinary disk wheel instead of upon the specially constructedconical wheels which are suitable only for the one purpose, and Ibelieve I am the first to devise an attachment whereby a scythe can beproperly ground upon the ordinary disk wheel. Other advantages of theconstruction incident to its cheapness, simplicity and ease of the arm19. This arm 19 carries a roller 21 having a flange 2-2 adapted to fitintothe groove at the edge of the scythe blade, such flange 22performing the function of the upturned edge 14 of the construction ofFig. 2. In order to still further guide the blade the wheel 23 isprovided, such wheel being mounted for rotation upon the depending arm24. Such arm is screw-threaded and held in position on the angle arm 19by means of the lock nuts 25. It will be seen that thisconstructionperforms substantially the same function as-the guide of'Fig. 2, but ismore expensive.

Fig. 1 illustrates still another modification adapted to be used with aconical grinding wheel 26. The attachment comprises a bracket 27 havingan upturned end 28 carrying the flanged roller 29 adapted to engage thegroove along the edge of the scythe blade; This form of attachment isillustrated in my Patent No. 1,113,394: of October 13, 1914, and the bar29 serves as a support for another attachment not shown, and forming nopart of the present invention, and in addition serves to steady theblade of the scythe as it moves back and forth. Various othermodifications of the invention are possible, but the foregoing serves toillustrate the broad principle involved in the use of a guide for thegrooved edge of ascythe blade provided with upwardly prd jecting meansfor engaging the groove in the blade and preventing lateral movement asthe blade is reciprocated.

What I claim is:

1. The combination with a grinding wheel, of a bracketand guide meanscarried thereby including an upwardly projecting means adapted to engagethe groove on the s de of a scythe blade remote from the cutting edge.

2. The combination with a disk grinding wheel, of a bracket and a guidemeans lying to one side of the face of the wheel, and comprisingupwardly projecting means adapted to engage the groove extending alongthe edge of a scythe blade.

3. The combination with a disk grinding wheel, of a bracket and a guidemeans lying to one sde of the face of the wheel, and comprising upwardlyprojecting means adapted to engage the groove extending wheel.

along the edge of a scythe blade, thesaid guide means being adjustabletransversely wheel, and comprising upwardly projecting means adapted toengage the groove extending along the edge of a scythe blade.

6. The combination witha disk grinding wheel, of a bracket and a guidemeans lying to oneside of the face of the Wheel in substantiallyvertical alinement with the axis of rotation of the wheel, andcomprising upwardly projecting means adapted to en gage the grooveextending along the edge of a scythe blade. 7 I I 7 7. The combinationwith a: disklgrinding wheel, of a bracket extending transversely of theedge of the wheel, and having a depending L portion with an upturned"edge lying opposite the side of the wheel and adapted to engage thegroove in the' edge of a scythe blade. 7

8. The combination with a disk grinding wheel, of a bracket extendingtransversely of the edge ofthe'wheel, and'having a depending L portionwith an upturned edge lying opposite the side of the wheel and.

adapted to engage the groove in the edge of a scytheblade, the said Lportion being adjustable toward and from the side of the wheel.

7 9. The combination with a disk grinding wheel, of a bracketextendingtransversely of the edge of the-wheel, and having a depending Lportion with an upturned edge.

lying opposite the side of the wheel and adapted to engage the groove inthe edge of a scythe blade, the said L portion being ad justable towardand from the axis of the 10. The combination with a disk grinding wheel,of a bracket extending transversely of the edge of the wheelinsubstantially the same vertical plane as the axis of rotation of thewheel, and having a depending L por tion w th an upturned edge lyingopposite the side of the wheel and adapted to engage the groove in theedge of a scythe blade.

JOHN s. WINCRA-NTZ. 1

Copies of this patent may be obtained for five cents each. by addressingthe Commissioner of Patents,

Washington, D. G. i

